FindMyMarathon / Race-day weather
Marine Corps Marathon Weather Forecast 2026 IS LIVE!
Check the Marine Corps Marathon weather for your time on the course.
Choose your start time and goal finish time for temperature, rain chance and wind. Free to use.
Your race details
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Your race forecast
Goal 2:00:00 Washington, DC local time
Start
7:20am- Wind
- 8 mph SW
- Gusts
- 36 mph
- Humidity
- 83%
- Dewpoint
- 44°F
- Rain chance
- 7%
Halfway
8:20am- Wind
- 8 mph SW
- Gusts
- 35 mph
- Humidity
- 80%
- Dewpoint
- 45°F
- Rain chance
- 7%
Finish
9:20am- Wind
- 8 mph SW
- Gusts
- 34 mph
- Humidity
- 75%
- Dewpoint
- 45°F
- Rain chance
- 7%
Checkpoint colorsStartHalfwayFinish
Expect a partly cloudy start near the Pentagon/Route 110 start near 51°F, with temperatures rising to about 55°F by the finish. Partly cloudy conditions should hold for much of the day. Wind impact looks mixed rather than strongly favorable or strongly difficult over the full course. Overall, the temperature setup looks fairly manageable for steady pacing. Gusts could make exposed sections feel more variable than the steady wind speed suggests.
Temperature & rain during your race
Wind along the course
Start to Mile 5
Slightly helpful
- Tailwind
- 23%
- Headwind
- 14%
- Gusts
- 36 mph
Miles 6 - 10
Neutral
- Tailwind
- 21%
- Headwind
- 20%
- Gusts
- 36 mph
Miles 11 - 15
Neutral
- Tailwind
- 3%
- Headwind
- 1%
- Gusts
- 35 mph
Miles 16 - 20
Neutral
- Tailwind
- 9%
- Headwind
- 9%
- Gusts
- 35 mph
Miles 21 to Finish
Slightly challenging
- Tailwind
- 9%
- Headwind
- 28%
- Gusts
- 35 mph
What to expect
- The opening miles should feel fairly comfortable for marathon running, with a good chance to settle into pace early.
- Late-race conditions look relatively manageable, which should reward runners who stay patient through Halfway and the second half.
- Wind impact looks mixed rather than strongly favorable or strongly challenging across the full route.
- Stronger gusts may make some open roads and bridge sections or exposed sections feel more variable than the steady wind numbers suggest.
What to wear & carry
Based on the start temperature, wind and rain risk.
- Race kit should be enough at the start
- Normal fluid plan likely fine
- No major rain gear needed
- Light gloves optional if you run cold
2026 vs. typical Marine Corps
Historical race-day comparison
| Conditions | 2026 forecast | Typical | Difference |
|---|---|---|---|
| Race average temp | 53°F | 57°F | -4° |
| Start temperature | 51°F | 51°F | -0° |
| Start humidity | 83% | 77% | +6% |
| Start wind speed | 8 mph | 7 mph | +1 mph |
| Start wind direction | SW | N | — |
| Start conditions | Partly Cloudy | Sunny | More cloud cover |
